By buying an index fund, you can roughly match the market return with ease. But if you buy good businesses at attractive prices, your portfolio returns could exceed the average market return. For example, the Advanced Technology & Materials Co., Ltd. (SZSE:000969) share price is up 23% in the last three years, clearly besting the market decline of around 21% (not including dividends).

Since the long term performance has been good but there's been a recent pullback of 6.6%, let's check if the fundamentals match the share price.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

During three years of share price growth, Advanced Technology & Materials achieved compound earnings per share growth of 23% per year. The average annual share price increase of 7% is actually lower than the EPS growth. So one could reasonably conclude that the market has cooled on the stock.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

It's probably worth noting that the CEO is paid less than the median at similar sized companies. But while CEO remuneration is always worth checking, the really important question is whether the company can grow earnings going forward. Dive deeper into the earnings by checking this interactive graph of Advanced Technology & Materials' earnings, revenue and cash flow.

A Different Perspective

While it's never nice to take a loss, Advanced Technology & Materials shareholders can take comfort that , including dividends,their trailing twelve month loss of 7.1% wasn't as bad as the market loss of around 15%. Of course, the long term returns are far more important and the good news is that over five years, the stock has returned 2% for each year. In the best case scenario the last year is just a temporary blip on the journey to a brighter future. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Even so, be aware that Advanced Technology & Materials is showing 2 warning signs in our investment analysis , you should know about...

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of companies that have proven they can grow earnings.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on Chinese exchanges.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.
This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.